Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

How can a man go eight days without sleep?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

A Monkey, a squirrel, and an Eagle are racing to the top of the mango tree. Assuming all these animals are in perfect shape, Which animal will reach to Banana first?

A girl was standing near the window thinking something. All of a sudden she decides something and throws something out of the window. She dies very soon after throwing it. She was perfectly healthy and had no disease or allergy. No one killed her and she did not commit suicide.

Can you think of any possible explanation that is logical as well for what happened there?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

No matter how little or how much you use me, you change me every month. What am I?